monkey vs little terror

monkey and little terror both are nouns.

Word	Noun	Adjective	Verb	Adverb
monkey	Yes	No	Yes	No
little terror	Yes	No	No	No

As nouns, little terror is a hyponym of monkey; that is, little terror is a word with a more specific, narrower meaning than monkey:

Other hyponyms of monkey include brat, holy terror, terror.

monkey (noun)	little terror (noun)
any of various long-tailed primates (excluding the prosimians)	a very troublesome child
one who is playfully mischievous

monkey (verb)	little terror (verb)
do random, unplanned work or activities or spend time idly
play around with or alter or falsify, usually secretively or dishonestly